STM32F103ADC+DMA和UART2中断冲突问题求助

rto.wang 2010-12-3 20:46 楼主

程序中使用了TIM2,UART1,UART2和ADC+DMA1中断，不加上UART2时都正常，加上UART2中断后，运行几分钟后ADC+DMA1的中断就不能进去了，更改了几种中断优先级方式后都没有解决。请大家看看是什么原因？
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
#ifdef  VECT_TAB_RAM
  /* Set the Vector Table base location at 0x20000000 */
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else  /* VECT_TAB_FLASH  */
  /* Set the Vector Table base location at 0x08000000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
/* Configure one bit for preemption priority */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
  /* Enable the TIM2 gloabal Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQChannel;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
  /* Enable the DMA channel1 gloabal Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
  /* Enable Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
  /* Enable Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQChannel;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 5;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
// NVIC_Init(&NVIC_InitStructure);
}

回复评论（4）

沙发 ZXZ2002

但定时中断一直能正常运行，启动ADC，
void TIM2_IRQHandler(void)
{
static INT16U count = 0;

  if (TIM_GetITStatus(TIM2, TIM_IT_CC1) != RESET)
  {
TIM_ClearITPendingBit(TIM2, TIM_IT_CC1);

ADC_SoftwareStartConvCmd(ADC1,ENABLE);
// Start ADC1 Software Conversion
capture = TIM_GetCapture1(TIM2);
TIM_SetCompare1(TIM2, capture + TimerCount_500);
  }
  else if (TIM_GetITStatus(TIM2, TIM_IT_CC2) != RESET)
  {
TIM_ClearITPendingBit(TIM2, TIM_IT_CC2);
capture = TIM_GetCapture2(TIM2);
TIM_SetCompare2(TIM2, capture + CCR2_Val);
  }
  else if (TIM_GetITStatus(TIM2, TIM_IT_CC3) != RESET)
  {
TIM_ClearITPendingBit(TIM2, TIM_IT_CC3);

capture = TIM_GetCapture3(TIM2);
TIM_SetCompare3(TIM2, capture + CCR3_Val);
  }
  else
  {
TIM_ClearITPendingBit(TIM2, TIM_IT_CC4);

capture = TIM_GetCapture4(TIM2);
TIM_SetCompare4(TIM2, capture + CCR4_Val);
  }
}

点赞 2010-12-4 08:01

板凳 wangxiaoyu

void DMA1_Channel1_IRQHandler(void)
{
static INT8U channel = 0;
static INT8U vchannel = 0;

if(DMA_GetITStatus(DMA1_IT_TC1)==SET)
{
gAllSampleData[channel]= ADC_ConvertedValue[0]&0x0fff;    //ADC_IN0
gVSampleData[vchannel] = ADC_ConvertedValue[1]&0x0fff;    //ADC_IN1
gDCSampleData[channel] = ADC_ConvertedValue[2]&0x0fff;    //ADC_IN8
if(++channel ==4){
      //一次的采样完成，设置数据处理标志位
      channel = 0;
      ADFinished = TRUE;
}
    else {
      ADC_SoftwareStartConvCmd(ADC1,ENABLE);       /* Start ADC1 Software Conversion    */
}
   DMA_ClearITPendingBit(DMA1_IT_TC1);
}
else if(DMA_GetITStatus(DMA1_IT_HT1)==SET)
{
   DMA_ClearITPendingBit(DMA1_IT_HT1);
}

}

void USART1_IRQHandler(void)
{

if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
{
UART1_Rec_Isr();
/* Clear the USART1 Receive interrupt */
USART_ClearITPendingBit(USART1, USART_IT_RXNE);
}
else if(USART_GetITStatus(USART1, USART_IT_TXE) != RESET)
{
UART1_Send_Isr();
/* Clear the USART1 Receive interrupt */
USART_ClearITPendingBit(USART1, USART_IT_TXE);
}
}

/*******************************************************************************
* Function Name  : USART2_IRQHandler
* Description : This function handles USART2 global interrupt request.
* Input       : None
* Output       : None
* Return       : None
*******************************************************************************/
void USART2_IRQHandler(void)
{
if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)
{
UART2_Rec_Isr();
/* Clear the USART1 Receive interrupt */
USART_ClearITPendingBit(USART2, USART_IT_RXNE);
}
else if(USART_GetITStatus(USART2, USART_IT_TXE) != RESET)
{
UART2_Send_Isr();
/* Clear the USART1 Receive interrupt */
USART_ClearITPendingBit(USART2, USART_IT_TXE);
}
}

点赞 2010-12-4 08:06